Presentation on theme: "How is an organism’s energy role determined in an ecosystem?"— Presentation transcript:
1 How is an organism’s energy role determined in an ecosystem? EcosystemsHow is an organism’s energy role determined in an ecosystem?Ocean EcosystemDesert EcosystemForest Ecosystem
2 Ecosystems – Energy Roles The Producers:Get energy by making their own food - photosynthesisExamples are plants, algae and plankton.
3 Ecosystems – Energy Roles The Consumers:Organisms that get their energy from eating food.
4 Ecosystems – Energy Roles The Decomposers:Organisms that get energy by breaking down dead organisms.Examples are bacteria and fungi.
5 Energy in an EcosystemWhat is the source of all energy in an ecosystem?Photosynthesis – using sunlight as energy to convert carbon dioxide and water into food.6H2O + 6CO > C6H12O6+ 6O2
6 Ecosystems – Energy Roles Three types of consumersCarnivores – eat only other animals (meat eaters)Omnivores – eat plants and other animalsHerbivores – eat only plants
7 Ecosystems – Energy Roles Scavenger:Carnivores that feed on dead organisms.
8 Ecosystems – Energy Roles Difference between scavenger and decomposer?
9 Food Chains:Third levelconsumerShows a specific series of feeding events in an ecosystem.Every feeding moves energy through an ecosystem.The Producers are always at the bottom.Arrows can be replaced by the phrase “is eaten by..”Second levelconsumerFirst level consumerproducer
10 Food Webs Many overlapping food chains Show feeding relationships for the whole ecosystem.-Food ChainFood Web
12 What does an energy pyramid show? The amount of energy that moves from one feeding level to another.
13 How does the amount of energy at one level of an energy pyramid compare to the amount of energy available at the next level up?There is more energy at the lower levels. As you move up energy is lostDecreasing energy
14 Energy Pyramids 10% of energy is transferred 90% of energy is lost Decreasing energyEnergy not transferred is used by the organism or lost as heat.
15 Energy Flows and matter is Cycled in an ecosystem Energy is supplied by the sun.Energy is lost as it flows through the ecosystem.Basic elements (matter) is continuously recycled through an ecosystem.